Rivers of Friuli-Venezia Giulia

The Natisone (; ; ) is a river in Slovenia and Italy. It flows for some time as a border river between Slovenia and Italy, continues in Slovenia and then crosses the border and continues in Eastern Friuli, in northeastern Italy. It is the main tributary of the Torre and a sub-affluent of the Isonzo. It has a pluvio-nival regime and belongs to the Adriatic Sea Basin.

thumb|right|250px|The source of the Timavo in San Giovanni di Duino The Timavo River, known in Slovene as the ' or ''''', is a two-kilometre stream in the Province of Trieste. It has four sources near San Giovanni () near Duino () and outflows in the Gulf of Panzano (part of the Gulf of Trieste) southeast of Monfalcone (), Italy.

The Slizza (Italian) or Gailitz (German; , ) is an Alpine torrent in Italy and Austria, a right tributary of the river Gail. Its drainage basin is .

protected area

river in Italy and Slovenia